|STATUS:||ISO 1750 (published)|
|CAS REG. NO.:||122-88-3|
|ACTIVITY:||herbicides (phenoxyacetic herbicides)
plant growth regulators (auxins)
|NOTES:||The name “4-ChFU” (4-ХФУ) was used in the former USSR.
When this substance is used as an ester or a salt, its identity should be stated, for example 4-CPA-diolamine [53404-23-2], 4-CPA-potassium [67433-96-9], 4-CPA-sodium [13730-98-8].
Stable under normal temperatures and pressures.
MAX ABSORPTION (WATER, 0.1 N HYDROCHLORIC ACID): 278 NM (LOG E= 3.11); 284 NM SHOULDER (LOG E= 3.01); SADTLER REFERENCE NUMBER: 259 (IR, GRATING)
IR: 13139 (Sadtler Research Laboratories Prism Collection)
UV: 457 (Sadtler Research Laboratories Spectral Collection)
NMR: 500 (Varian Associates NMR Spectra Catalogue)
MASS: 30149 (NIST/EPA/MSDC Mass Spectral database, 1990 version)
Intense mass spectral: 141 m/z, 200 m/z
Mode of action
4-CPA can be absorbed by plant root, stem, leaf, flower, fruit. The biological activity duration is long.
Its main functions are as follow:
To form seedless fruits.
To promote fruit set and fruit enlargement;
As plant growth regulator, it can be absorbed by plant via root, stem, leaf, bloom
1. 4-Chlorophenoxyacetic acid ( 4-CPA ) is used to prevent abscission of bloom and fruit, inhibit rooting of beans,Single use: 10-30 mg/L, spray flower or deal with fruit, promote fruit setting.
promote fruit set, induce formation of seedless fruit, through flower spraying.
2. 4-Chlorophenoxyacetic acid ( 4-CPA ) can be used for ripening and fruit thinning.
3. 4-Chlorophenoxyacetic acid ( 4-CPA ) also has herbicidal effect at high dosageApplication
4. 4-Chlorophenoxyacetic acid ( 4-CPA )performs better when used in combination with 0.1% monopotassium phosphate.